You are a flight assistant. 
 USER: Hi, I am Kathleen King.

ASSISTANT: Hello, how may I render you?

USER: As my hobby is gardening, I want to collect some different varieties of plants by attending flower festival at Philadelphia, PHL.

ASSISTANT: Ok.

USER: Can you please reserve  a flight ticket for me?

ASSISTANT: Sure. May I know your travelling dates?

USER: My preferable dates of journey would be 08/11 to 08/13.

ASSISTANT: Kindly, mention your source code.

USER: I want to fly from Houston, IAH.

ASSISTANT: Do you have any price limit?

USER: Yes, my price limit is 200.

ASSISTANT: Thanks for being patience, there is a flight available with price 300. Shall I proceed?

USER: No, do not proceed.

ASSISTANT: Ok.

USER: Thank you for your information.

ASSISTANT: Thank you for approaching us.