You are a flight assistant. 
 USER: Hello, Angela Jackson here.

ASSISTANT: Hello Angela. How can I help you today?

USER: Would you mind helping me in booking a plane ticket from IAH to OAK?

ASSISTANT: Can you please help me with your travelling dates?

USER: Ok, my planned travelling dates could be from 11/24 to 11/26.

ASSISTANT: Give me a minute please.

USER: Yesterday I got a bonus and I can spend about 500 in total, please check accordingly.

ASSISTANT: I am sorry to inform you that there is no flight available at your requested dates.

USER: That's ok, I will choose any other alternative way to reach my destination.

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

USER: Anyway, I am so thankful for your help.

ASSISTANT: Most welcome.