You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I serve you?

USER: Can you help me to book a connecting flight?

ASSISTANT: Sure, May I know the travelling dates?

USER: My travelling dates are July 19 and 21.

ASSISTANT: Please help me with your journey codes.

USER: I am planning to travel from HOU to SEA.

ASSISTANT: Do you have any connection limit?

USER: I prefer connecting flight.

ASSISTANT: Is there any other requirements?

USER: No.

ASSISTANT: May I know your name?

USER: My name is Sandra Mitchell.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: No issues, thank you for your time.

ASSISTANT: Thank you for opting us.