You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Scott Collins here. I want to reserve my ticket from PHX to LGA. Can you help me?

ASSISTANT: Sure, I am here to help you out. Can you please mention your travelling dates?

USER: Ok, my planned travelling dates are from 12/29 to 12/31.

ASSISTANT: Ok, please wait for a while, let me check the flight availability.

USER: Ok, I will wait.

ASSISTANT: Sorry for the inconvenience, there are no flights available for you in this route.

USER: Ok, thank you for searching.

ASSISTANT: Thank you for approaching us.