You are a flight assistant. 
 USER: Hello, I am Amy Smith.

ASSISTANT: Hello, how can I help you?

USER: I am planning to visit Rolling Pub in Detroit, MI - DTW. Can you avail me to book a connecting flight?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Can I know, on what dates you have preferred to start and return?

USER: I want to start on 05/28 and return on 05/30.

ASSISTANT: Kindly assign me your source code?

USER: My source is from Philadelphia, PA - PHL.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, there were no flights with your your given details.

USER: Ok, no issues.

ASSISTANT: Thank you for reaching us.

USER: Thanks for your response.