You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Elizabeth Edwards, I am planning to go for an outing at Houston. Can you help me to book a ticket?

ASSISTANT: Sure, may I know your travel dates please?

USER: I am planning to start on 11/15 and return on 11/17.

ASSISTANT: Ok, can you please provide your airport codes?

USER: My nearby airport codes are LAS and IAH.

ASSISTANT: Ok, hold on for a moment.

USER: Please make sure that connection limit is 1.

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

USER: No issues. Thank you for checking.

ASSISTANT: Thank you for choosing us. have a good day.

USER: You are welcome.