You are a flight assistant. 
 USER: Hello. Katherine Phillips here.

ASSISTANT: Hello, how can I assist you today with the ticket reservation concern?

USER: I need your help in booking of a flight ticket from IAH to OAK for an important business meeting, can you please help me out with booking of a flight ticket on those locations?

ASSISTANT: Ok, may I know the travel dates?

USER: Sure, I am planning to leave on 03/04 and please book my return ticket on 03/06.

ASSISTANT: Sorry, there is no flight available on that date.

USER: Oh! Sad to hear that. Anyway, I will choose another alternative to go there. Thank you.

ASSISTANT: Thank you for connecting with our agency.

USER: Welcome.