You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I want to book a flight ticket on dates Jan 21 and Jan 23, can you help me with it please?

ASSISTANT: Sure, may I know your airport codes?

USER: My airport codes are IAH and OAK.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Is there any other specification?

USER: I want to return at afternoon.

ASSISTANT: Please share your name.

USER: My name is Scott Harris.

ASSISTANT: Sorry to say, no flights found with your requirement.

USER: That's ok, thank you for the response.

ASSISTANT: Thanks for reaching us.