You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Edward Baker here. Could you book my ticket in normal-cost airlines?

ASSISTANT: Ok, may I know your travelling dates?

USER: My itinerary dates are Nov 23 and Nov 25.

ASSISTANT: Mention your travelling airport codes?

USER: My genesis and terminus airport codes are LGA and IAD.

ASSISTANT: Sorry, no flights found on your route.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.