You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: Myself Linda Anderson from Oakland.

ASSISTANT: Welcome to flight booking agency Linda Anderson.

USER: Thanks, I am planning to visit Houston for a business meeting, can you please help me out with booking of a flight ticket from OAK to IAH?

ASSISTANT: Sure, I am glad to help you with that. Can you please provide your preferable departure and return dates of travelling?

USER: Thank you for your response, I want to departure on June 03 and please confirm my return ticket also on June 06.

ASSISTANT: Please reconfirm your travelling dates because flights are not available on those travelling dates.

USER: My departure date is June 03 but I want to return on June 05 so please check with this dates.

ASSISTANT: Do you have any other specifications?

USER: Yes, I want a direct flight.

ASSISTANT: Please wait a moment to check the flights on your route.

USER: Ok.

ASSISTANT: We regret to inform you that, there are no direct flights moving to your region with your planned dates of travelling.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Thank you for reaching us, have a great day.