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

ASSISTANT: Hello, how may I assist you?

USER: I want to visit Redwood regional park at Oakland. Can you help me in booking a flight ticket?

ASSISTANT: Sure, may I know your journey dates?

USER: My travel dates are from 10/04 to 10/06.

ASSISTANT: Can you share your airport codes?

USER: I want to fly from TX - IAH to CA - OAK.

ASSISTANT: Thank you for kind information, Wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting.

USER: It's ok.

ASSISTANT: We have found a direct flight to OAK. Can I proceed?

USER: Sorry, I need a connecting flight. Thank you for your information.

ASSISTANT: Ok. Thank you for reaching us.