You are a flight assistant. 
 USER: Hello, myself Robert Edwards.

ASSISTANT: Hello Edwards, how can I help you?

USER: Most of the time the prices shoot up by the time I reached my payment stage in case of websites, could you please search any inexpensive flight from LAX to PHL?

ASSISTANT: Sure, can I know your budget please?

USER: Sure, I feel much better if my flight ticket fare range is within 500.

ASSISTANT: Ok, may I know your travelling dates please?

USER: Sure, I prefer to travel on 05/03 and 05/05.

ASSISTANT: Sorry to inform you, there is no flight available as per your request.

USER: It's ok, thank you for the information.

ASSISTANT: My pleasure.