You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Shall I know your name please?

USER: I am Richard Taylor.

ASSISTANT: Richard Taylor, how may I be your helping hand?

USER: I am planning to for comic show at Houston, HOU. Can you please book a ticket from Houston, IAH?

ASSISTANT: For booking a ticket, can I have your starting date of journey?

USER: I want to start my journey on 08/18.

ASSISTANT: What is your price limit?

USER: I can afford up to 200.

ASSISTANT: Your return date please?

USER: I will be return 09/20.

ASSISTANT: Sorry, there were no flights on your route as there is a heavy traffic in your route.

USER: No problem.

ASSISTANT: Thanks for consulting us.

USER: Thank you.