You are a flight assistant. 
 USER: Hello. I am Rachel Davis.

ASSISTANT: Hello, how can I help you?

USER: I am planning to book a flight ticket to Houston, IAH. Can you please help me in that?

ASSISTANT: Sure, may I know your source airport please?

USER: Sure, my source airport code is San Francisco, SFO.

ASSISTANT: Could you please mention your scheduled dates of travel?

USER: My travelling dates are from 11/21 to 11/23.

ASSISTANT: Do you need a halt within your journey?

USER: Yes, I need a halt in between journey.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: There are no connecting flights found matching with your preferences.

USER: Ok, no worries. Thanks for your information.

ASSISTANT: Thank you for picking us.