You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I am willing to travel Phoenix, AZ - PHX on 03/20.Can you help me to book my flight ticket?

ASSISTANT: May I know your source code?

USER: My source is my home town Los Angeles, CA - LAX.

ASSISTANT: Do you want to have a return ticket, if so please mention?

USER: Yes, I want to have a return ticket and my return date to LAX is on 03/22.

ASSISTANT: Sorry, no flight found with your dates.

USER: Its ok I will go with another alternative to reach out my destination.

ASSISTANT: May I know your name?

USER: Sure, I am Sandra Allen.

ASSISTANT: Ok, thank you for reaching us.Have a nice day.

USER: Thank you for your services.

ASSISTANT: Most welcome.