You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you now?

USER: I need a reservation from Las Vegas to Austin, can you help me?

ASSISTANT: Sure, may I know the preferable dates please?

USER: My travelling dates will be from 01/15 to 01/17.

ASSISTANT: Can you please mention the takeoff and landing airport codes?

USER: My nearest airport is LAS and my destination airport code is AUS.

ASSISTANT: May I know your name please?

USER: Myself James Walker.

ASSISTANT: Sorry, there are no flights found on your requirement.

USER: Ok, no issues.Thank you for assisting me.

ASSISTANT: Do you have any other dates to travel?

USER: No, thank you for helping.

ASSISTANT: Thank you for approaching us, have a nice day.

USER: You are welcome.