You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am George Thompson. Can you please book a flight ticket from HOU to DTW?

ASSISTANT: Sure, can you please share your travel dates?

USER: Sure, I have planned my travel dates as May 02 and May 04.

ASSISTANT: Do you have any connection limit?

USER: I am looking for single connecting flight mostly.

ASSISTANT: May I know your airline preference?

USER: I would expect normal cost airlines.

ASSISTANT: Which class do you prefer?

USER: I am ok with any class to travel.

ASSISTANT: Do you have any specific departure and arrival time?

USER: Yes, I am looking for departing time must be afternoon only.

ASSISTANT: Ok, please be on hold.

USER: Sure, take your time.

ASSISTANT: Sorry, there are no flights in this route as per your travelling details.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Thank you for reaching us.