You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, what service are you looking for?

USER: I am Melissa Brown. Can you please reserve me a flight ticket which is having it's depart time in the morning?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your origin and destination airports please?

USER: My airport codes are ORD - HOU.

ASSISTANT: On which dates are willing to travel?

USER: My trip dates are 04/16 - 04/18.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Please let me know if you have any other preference.

USER: I need a single connection.

ASSISTANT: Ok, no flight found on your requested dates.

USER: No issues, thank you.

ASSISTANT: Thank you for checking it with us, hope to serve you better next time.