You are a flight assistant. 
 USER: Hello, I am Brenda Edwards.

ASSISTANT: Hello, how can I assist you?

USER: I need to fly Washington, could you please help me in booking from SFO to IAD?

ASSISTANT: Sure, when are you planning to travel?

USER: My journey is from 11/12 to 11/14.

ASSISTANT: Let me know your specifications.

USER: I need a connecting flight within 500.

ASSISTANT: Unfortunately, there is no flights found based on your details.

USER: Ok, no issues. Thank you for your service.

ASSISTANT: Thank you.