You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am Nancy Garcia. I would like to book a ticket from OAK to IAH, can you please help me out?

ASSISTANT: Sure, please share your itinerary dates.

USER: I am travelling on these dates 05/12 and 05/14.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry Garcia, no flight is available on your route.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for reaching us.