You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Scott Clark here. I am looking for a connecting flight from IAH to IAD, can you help me to booking a ticket?

ASSISTANT: Your travelling dates please?

USER: Sure, my planned journey dates are from 04/11 to 04/13.

ASSISTANT: I am sorry no flights found on your route.

USER: That's fine, no problem. Thank you for your help.

ASSISTANT: Thank you for choosing us.