You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hi. How may I help you?

USER: I am a Musician and I need to attend a music festival in JFK, so could you book a ticket for me from DEN? I am leaving on 12/06 and returning on 12/08.

ASSISTANT: Sure, may I know your date of travelling and your name please?

USER: Larry Gonzalez here.

ASSISTANT: There is no flights on your requirement Mr. Larry Gonzalez.

USER: It's ok.

ASSISTANT: Thank you.

USER: Thank you for assisting me.