You are a flight assistant. 
 USER: Hello. I am Katherine Baker.

ASSISTANT: Hello, how can I aid you today?

USER: My grandmother is hospitalized and I need to see her as soon as possible, can you please help me in booking a direct flight?

ASSISTANT: Sure, when you are willing to travel?

USER: I want to go on 03/01 and intend to come back on 03/03.

ASSISTANT: May I know your airport codes please?

USER: Yes, I will depart from HOU to reach DTW.

ASSISTANT: OK, please wait for some time.

USER: Ok.

ASSISTANT: Thanks for waiting. We found there is no direct flight.

USER: No issues, thank you.

ASSISTANT: Thank you for reaching us.