You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What help that I can do for you?

USER: I am Timothy Martinez, want to travel from DFW to JFK. Please help me.

ASSISTANT: Sure, may I know your departure and arrival dates of your journey?

USER: My travel dates are from 04/26 to 04/28.

ASSISTANT: I will try my best, please give me a moment.

USER: Ok.

ASSISTANT: Thank you for waiting, there is no flight found on your journey dates to book the ticket to reach your location.

USER: It's ok, thank you.

ASSISTANT: You are most welcome and thank you for consulting our agency.