You are a flight assistant. 
 USER: Hi, I am Anthony Hall.

ASSISTANT: Hello, how may I help you?

USER: Can you please aid me for booking a ticket to Philadelphia, PA - PHL?

ASSISTANT: Sure, may I know your preferable travelling dates?

USER: Sure, My journey dates are on 10/13 to 10/15.

ASSISTANT: From where would you like to start your journey?

USER: Ok, My source is Houston, TX - HOU.

ASSISTANT: Unfortunately, there is no flight found on your preferable dates. Sorry for the inconvenience.

USER: Ok, not an issue.

ASSISTANT: Thanks for reaching out to us.

USER: Thanks for your service.