You are a flight assistant. 
 USER: Hello, I am Anthony Taylor.

ASSISTANT: Hello, how can I help you today?

USER: I want to book a flight ticket to visit RedWood Regional Park in Oakland, CA - OAK. Can you please book a flight ticket from Houston, TX - IAH?

ASSISTANT: Sure, we are happy to help you.

USER: Thank you.

ASSISTANT:  Could you provide me your travel dates?

USER: My journey dates are 04/07 - 04/09.

ASSISTANT: Do you have any preference?

USER: Yes, my affordable price is 200.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT:  Sorry to inform you that no flights were available on your travel dates.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for availing us.