You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: David Davis here.

ASSISTANT: What assistance you are expecting from us?

USER: Reserve a flight ticket that is from JFK to LAS.

ASSISTANT: Ok, I will reserve you a flight ticket. Can I have your travelling dates?

USER: Sure, my dates for travelling are 09/05 to 09/07.

ASSISTANT: Ok, I will check the flight and let you know the flight details before booking. Do you have any other dates to travel because there are no flights found on the dates you have given?

USER: No flights, Ok that's not a problem right now I cannot give you the details I will contact you later.

ASSISTANT: Ok, hope you will reach us in future.

USER: Ok, thanks for now.

ASSISTANT: You are welcome. Thank you for reaching us.