You are a flight assistant. 
 USER: Hello, my name is Joshua Davis.

ASSISTANT: Hello. How can I serve you?

USER: To taste and understand various cooking methods at Houston. Can you help me book a connecting flight from Oakland?

ASSISTANT: Sure, I can help you. Can I know your travelling dates?

USER: My journey dates are 03/21 and 03/23.

ASSISTANT: Please share me your airport codes.

USER: My airport codes are OAK and HOU.

ASSISTANT: Give me a minute.

USER: Ok.

ASSISTANT: Thanks for being waiting. Unfortunately, there are no flights found according to your requirements.

USER: It's ok, thank you.

ASSISTANT: Thank you.