You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to book a flight ticket to PHL to meet my childhood friend. Can you please help me for booking from HOU?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are on May 09 and 11.

ASSISTANT: Do you need connecting flight?

USER: Yes.

ASSISTANT: May I know your name?

USER: Sandra Baker is my name.

ASSISTANT: Do you have any other preferences?

USER: No.

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

USER: Ok, thank you.

ASSISTANT: Thank you for choosing us.