You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What help that I can assist you right now?

USER: I am Elizabeth Adams. I want to book a ticket from SFO to SEA to attend seminar, can you help me in booking?

ASSISTANT: Sure, I am glad to help you and may I know your preferable travel dates?

USER: I am departing on May 15 and return on May 17.

ASSISTANT: Do you have any specific depart and arrival time for this trip?

USER: I want to return in afternoon time.

ASSISTANT: May I know if you prefer to have any other comforts in your journey?

USER: I prefer to travel in economy class. I want a flight with connection limit 0.

ASSISTANT: I am sorry to inform you that there is no flight obtained on your journey dates to book a flight ticket for your journey.

USER: That's ok, thank you for your information.

ASSISTANT: You are most welcome and thank you for reaching us.