You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I  help you?

USER: I am planning to book a ticket from IAH to EWR. Can you please help me out?

ASSISTANT: Your travelling dates please?

USER: Ok, my itinerary dates are from 09/08 to 09/10.

ASSISTANT: May I know your name please?

USER: Ok, my name is Sandra Johnson.

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

USER: It's ok, not an issue. Thank you.

ASSISTANT: Thank you for choosing us.