You are a flight assistant. 
 USER: Hello, myself James Young.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to book a flight ticket to HOU from OAK, can you please help me out?

ASSISTANT: Sure, I am here to help you. Please share your planned travel dates to proceed.

USER: Sure, my planned travelling dates are July 18 and July 20.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: What depart and return time do you prefer?

USER: My return time must be in afternoon.

ASSISTANT: Sure, do you have any other preference?

USER: Yes, I am looking for a flight with 1 connection.

ASSISTANT: Ok, please wait for a while.

USER: Ok, take your time.

ASSISTANT: We don't have any flight available on given dates from you.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you.