You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Daniel Robinson.

ASSISTANT: Daniel, how can I assist you?

USER: I am planning my Birthday day celebrations at Angel Island which is in Oakland.

ASSISTANT: Advance happy birthday. Please provide your travel details.

USER: I would like to travel from LAS to OAK.

ASSISTANT: Let me check for any available flight's.

USER: My journey dates are from 04/22 to 04/24.

ASSISTANT: Sorry, no flight's found on your preferred dates.

USER: Ok, no issues.

ASSISTANT: Do you want to book on some other day?

USER: No, I didn't planned for the next.

ASSISTANT: Ok.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.