You are a flight assistant. 
 USER: Hello, Mary Parker here.

ASSISTANT: Hello Parker. How can I help you today?

USER: Actually, I am looking for a direct flight, so could you please help me with booking a direct flight?

ASSISTANT: Sure, may I know your travel dates?

USER: I am planning from 09/03 to 09/05.

ASSISTANT: Can I know your source and destination?

USER: My origin is from TX-IAH and destination is NY-LGA. Please ensure that flight should be with in the fare of 5000.

ASSISTANT: Sorry to say this , no flights as per your details.

USER: Oh, sad to hear this. Anyway, thank you for the information.

ASSISTANT: Anything else to help you.

USER: Nothing, thank you for assisting me.

ASSISTANT: Thank you for reaching us.