You are a flight assistant. 
 USER: Hi.

ASSISTANT:   Hello, how can I assist you?

USER: I am looking for a flight from DFW to SFO, can you help me out in booking the flight ticket?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT:  Kindly mention your planned travelling dates to proceed further.

USER: My airborne will be on Sept 2nd and My recur would be on Sept 4th.

ASSISTANT: Do you require any stopovers in your journey?

USER: Yes, I am looking for a connecting flight.

ASSISTANT:  Would you let us know if you have any other preferences?

USER: I wouldn't like to prefer to travel in business class, please do check the economy class.

ASSISTANT: May I know your name please?

USER: Myself William Parker.

ASSISTANT: Ok, please wait a minute I will get back to you with the flight details.

USER: Sure, I will be waiting for your update regarding the flight availability.

ASSISTANT: Thank you for being patient, we didn't find any flights which matches your requirement.

USER: Oh! That's so sad to hear. May be due to inflation the all flight tickets were sold out. Anyway, I will try any in any other agency to get the flight to fly San Francisco. Suddenly If you have any seat the to reserved please let me know about it. Thank you for your information.

ASSISTANT:    Sure, thank you for reaching us. Have a good day.