You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Joshua Phillips here.

ASSISTANT: Joshua Phillips, how can I assist you?

USER: I am planning to celebrate my birthday at Los Angeles. Please help me in booking a ticket from IAH to LAX.

ASSISTANT: Sure, can you provide your journey dates please?

USER: I am planning to travel on dates 07/19 and 07/21.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: There is a flight 1003 of Frontier airlines available for you. Shall I proceed?

USER: Proceed if the price is below 500.

ASSISTANT: Your ticket is booked with price 100.

USER: Thank you for helping me.

ASSISTANT: Welcome.