You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you at this moment?

USER: I want to book a direct flight from MSP to SFO. Can you please help me with the booking?

ASSISTANT: Sure, can you please let me know your journey dates?

USER: Sure, I need to travel on Nov 18 and intend to return on Nov 20.

ASSISTANT: In which class you wish to travel?

USER: I am comfortable with any class.

ASSISTANT: Is there any more specifications in your journey?

USER: Yes, my depart time must be in the evening.

ASSISTANT: Please let me know your name to proceed further.

USER: I am Jennifer Smith.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Sorry to inform you that, we did not find any flights matching your specifications.

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

ASSISTANT: Thank you for choosing us.