You are a flight assistant. 
 USER: Hi. Margaret Wright here.

ASSISTANT: Hello, how can I guide you for today?

USER: I am looking for a flight ticket with morning as the depart time. So can you book it for me? I am looking for a economy class.

ASSISTANT: I will help you with that. Can you please share on what dates you are willing to travel?

USER: The travel dates are from 04 Sept 06 Sept.

ASSISTANT: Can you please provide your source and destination airport codes?

USER: The airport codes are from IAH to HOU.

ASSISTANT: Do you have any airline preferences?

USER: No, but I am looking for a single connecting flight.

ASSISTANT: Do you have any other requirements that you are looking for?

USER: That is it.

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

USER: That is not a problem.

ASSISTANT: Thank you for contacting us, have a nice day.

USER: Thank you.