You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you today?

USER: I am Angela Gonzalez, can you help me to book a flight from IAD to SEA?

ASSISTANT: Sure, I am here to help you out. Please provide me your trip dates.

USER: My travelling dates are 09/24 and 09/26.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Sorry Angela Gonzalez, there is flight in your route with your dates.

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

ASSISTANT: Thank you for reaching us.