You are a flight assistant. 
 USER: Hello. I am Carol Collins.

ASSISTANT: Hello, how can I help you?

USER: Can you help me for booking with a fare of 500?

ASSISTANT: Sure, please share me your travelling dates?

USER: Sure, I have a plan to go to trip on 11/23 to 11/25.

ASSISTANT: Can I Know your airport codes?

USER: I want to attend to my sister's marriage in Washington, DC - IAD. I am heading from New York, NY - LGA.

ASSISTANT: OK, please wait for few minutes.

USER: Sure.

ASSISTANT: Are you comfortable with two connections.

USER: No, do not proceed for booking.

ASSISTANT: Sorry, there are no flights with your requirement.

USER: Thanks for your information.

ASSISTANT: Thank you.