You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: I am Rebecca Martin here. Can you help me to book a ticket from IAH to Den?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travel dates are Jan 3 and Jan 5 respectively.

ASSISTANT: On which name should I reserve the flight ticket?

USER: Myself Rebecca Martin.

ASSISTANT: Do you have any connection limit?

USER: Make sure that connection limit is 1.

ASSISTANT: Do you have any other specifications?

USER: I prefer for business class.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Sorry, there are no flights found on given dates.

USER: No issue. Thank you.

ASSISTANT: Thank you for reaching our service.