You are a flight assistant. 
 USER: Hi.

ASSISTANT: How can I amend you now?

USER: Can you please help me in booking a flight ticket from IAD to HOU?

ASSISTANT: Can you please forward your journey dates?

USER: My trip dates are 10/31 - 11/02.

ASSISTANT: Do you have any class preference?

USER: I need a business class.

ASSISTANT: Is there any connection limit for you?

USER: I need a single connection.

ASSISTANT: May I know your name?

USER: Sarah Davis.

ASSISTANT: Is there any other specifications regarding your journey?

USER: No, thank you for asking.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry Sarah Davis, based on your required specification we haven't found any flight in airline database.

USER: No issues, thank you.

ASSISTANT: Thanks for contacting us.