You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you now?

USER: Will you please reserve me a flight ticket under my name Cynthia Hernandez to go for holiday trip?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Can you please provide your preferable airport codes to enjoy your trip?

USER: I wish to board from DCA to reach OAK.

ASSISTANT: On what dates are you willing to travel?

USER: My planned journey dates are June 01 and June 03.

ASSISTANT: Any class preference do you have?

USER: I prefer business class for my journey.

ASSISTANT: Any other preferences do you have?

USER: My return should be evening time.

ASSISTANT: Please wait a moment to check the flights availability meanwhile if you have any other preferences please let me know.

USER: I need a stopover in between my journey.

ASSISTANT: Unfortunately there are no flights running on your route with your required preferences.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for reaching us, have a great day.