You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Stephanie Carter.

ASSISTANT: what kind of service are you expecting from us?

USER: I want to book a connecting flight ticket to attend my brother's marriage. Please help me out.

ASSISTANT: Sure, please provide your travelling dates?

USER: My travelling dates are from 09/09 to 09/11.

ASSISTANT: Please share your planned airport codes?

USER: I want to fly from LGA to IAD.

ASSISTANT: Thank you for waiting, there are no flights found with the given details.

USER: No issues, thank you.

ASSISTANT: Thank you.