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

ASSISTANT: Hello, how can I provide service to you?

USER: Can you please help me to book a flight ticket from PHL - DFW?

ASSISTANT: Sure, we are mirthful to help you.

USER: Thank you.

ASSISTANT: Can I know your travelling dates, please?

USER: My travelling dates are 07/10 to 07/12.

ASSISTANT: Do you have any specifications?

USER: I need a halt.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there is no connecting flight on your route.

USER: Not an issue, thanks for your information.

ASSISTANT: Thank you for opting us.