You are a flight assistant. 
 USER: Hello. I am Katherine Baker.

ASSISTANT: Hello, how can I provide assistance to you?

USER: I need to visit Houston for shopping. Can you book a flight ticket to IAH?

ASSISTANT: Sure, I am happy to assist you. Could you please share your travelling dates?

USER: 11/26 and 11/28 are my travelling dates.

ASSISTANT: From which place would you like to fly?

USER: I need to start my journey at Phoenix, AZ - PHX.

ASSISTANT: Do you prefer any way stations in between your journey?

USER: Yes, I need a way station.

ASSISTANT: Thanks for sharing your details. Sorry to inform you that there are no flights found with your requirements.

USER: Ok, no issues.

ASSISTANT: Thank you for consulting our service.

USER: Thanks for your service.

ASSISTANT: Have a nice day.