You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I would like to book a ticket to attend a meeting at DEN. Can you please help me out from BOS?

ASSISTANT: Sure, please help me with your journey dates.

USER: I would like to travel on Jan 13 and return back on Jan 15.

ASSISTANT: Ok, Do you have any class preference?

USER: I am ok with any class preference.

ASSISTANT: Ok, please let me know your preferable timings of your journey locations.

USER: I am ok with any times.

ASSISTANT: Ok, Do you prefer direct flight or connected flight?

USER: I am looking for a connecting flight.

ASSISTANT: Ok, May I know your airline preference?

USER: I am looking for a normal cost airline.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for your time, there were no flights found with your given requirements.

USER: That's fine, thank you for your service.

ASSISTANT: Ok, May I know your name for documentation purpose?

USER: Yes, I am Jessica Johnson.

ASSISTANT: Ok, Thank you for contacting us.