You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you?

USER: I want to book a ticket from DFW to SEA to attend seminar, can you help me in booking?

ASSISTANT: Sure, may I know when are planning to make your trip?

USER: I am departing on Mar 11 and return on Mar 13.

ASSISTANT: Ok, May I know which type of class you are comfortable with?

USER: I am comfortable with any class.

ASSISTANT: Can you tell me your good name please?

USER: My name is Catherine Mitchell.

ASSISTANT: Please wait for a moment.

USER: Sure, take your time.

ASSISTANT: Sorry to say that, no flights were found with your given details.

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

ASSISTANT: Thank you for reaching us.