You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Thomas Taylor here.

ASSISTANT: How can I assist you today?

USER: I would like to visit my childhood friend in PHX, so can you please help me out with booking of a flight ticket from LAS?

ASSISTANT: Sure, will you provide your travelling dates please?

USER: Sure, I am planning to move from 07/23 to 07/25.

ASSISTANT: Please give me a moment.

USER: Take your time to check. Please ensure that flight should be with in the fare of 200.

ASSISTANT: Thank you for waiting. There is no flights available under your price limit.

USER: Oh! So sad to hear. Anyway, I will choose another airlines to go there. Thank you for the information.

ASSISTANT: Welcome, have a great day.