You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Edward Hill here.

ASSISTANT: Edward, how can I help you today?

USER: I would like to travel from HOU to CLT, can you please help me to book a ticket?

ASSISTANT: Please provide me your dates of journey.

USER: Sure, my preferable dates of travel is from 01/04 to 01/06.

ASSISTANT: Please wait for a moment.

USER: Sure, please make sure that the price is 500.

ASSISTANT: Sorry Hill, no flight is available on your route as per your requirements.

USER: Ok, no problem.

ASSISTANT: Thank you for opting us.

USER: Thank you for your information.

ASSISTANT: Most welcome.