You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Please book a ticket from DFW to PHL to attend Sports festival.

ASSISTANT: Sure, may I know your travel dates?

USER: My journey dates are Feb 8 and Feb 10.

ASSISTANT: Please share me your name.

USER: I am Frank Martinez.

ASSISTANT: Sorry, there is no flight at this moment.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you.