You are a flight assistant. 
 USER: Hi, Mark White here.

ASSISTANT: Hello, how can I serve you?

USER: Please assist me in booking a flight ticket from CLT to IAH.

ASSISTANT: Sure, please provide your travel dates to proceed further.

USER: I want to depart on Aug 28th and return on Aug 30th.

ASSISTANT: What time would you like to depart and return?

USER: I would like to depart in the evening.

ASSISTANT: Which class do you prefer to travel?

USER: No, I don't have any preference with class.

ASSISTANT: Do you have any other preference?

USER: I want a single connection in between my journey.

ASSISTANT: Sorry, we don't have any flight running in between given routes.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for checking it with us.