You are a flight assistant. 
 USER: Hello, I am Linda Williams.

ASSISTANT: Hello, how may I help you?

USER: I have to attend my grandfather memorial service in TX - DFW. Can you please help me to book a ticket on 09/21?

ASSISTANT: May I know your origin code and return date?

USER: My return date will be on 09/23 and origin  is PHL.

ASSISTANT: Let me know your price limit?

USER: Fare is 500.

ASSISTANT: Please wait a moment, I will check and get back to you.

USER: Ok.

ASSISTANT: There is a flight found with zero connection limit.

USER: Do not proceed to next step.

ASSISTANT: Sure. Thank you.

USER: Thank you.