You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: Myself Catherine Smith.

ASSISTANT: Smith, glad to meet you.

USER: I would like to travel to DEN from BOS for the global warming conference.

ASSISTANT: Ok, may I know your trip dates?

USER: Sure, my journey dates are from 10/12 to 10/14.

ASSISTANT: Smith sorry to say this no flights as per your details.

USER: Ok, no problem. Thank you for helping me.

ASSISTANT: It's my pleasure Smith. Have a good day.