You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you the best today?

USER: I am Donna Anderson.

ASSISTANT: Ok.

USER: I want to book a flight ticket from AZ-PHX to CA-OAK. Can you help me with this?

ASSISTANT: Sure, I will help you in booking a ticket. Let me know your budget for flight ticket.

USER: 200 is my fare.

ASSISTANT: When you are planning to depart and arrive?

USER: 08/27 and 08/29 are my travelling dates.

ASSISTANT: Just hold on a moment, I will check with the airlines and let you know the information.

USER: Ok.

ASSISTANT: Thanks for your precious time, we are sorry to inform you that there is no flights found with your given dates.

USER: No issue.

ASSISTANT: Thank you for approaching us.

USER: Thank you.