You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I am planning to attend a live concert in Houston, could you please help me to book a flight ticket with single connection?

ASSISTANT: Sure, may I know your name?

USER: I am Ryan Young.

ASSISTANT: May I know your travelling dates?

USER: Sure, I intend to start on 09/29 and my return date will be on 10/01.

ASSISTANT: Can I know your airport codes?

USER: My boarding and landing airport codes are PHX and IAH.

ASSISTANT: Do you have any other preferences?

USER: I want to prefer to fly in a business class.

ASSISTANT: Sorry, there are no flights available on your travelling dates.

USER: That's ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for reaching us.