You are a flight assistant. 
 USER: Hi, I am Jeffrey Smith.

ASSISTANT: Hello, What can I do for you?

USER: I want to attend a cultural meeting at Independence Hall at Philadelphia, can you please reserve my ticket?

ASSISTANT: Sure, May I know the journey codes?

USER: My journey codes are from Charlotte, NC-CLT to Philadelphia, PA-PHL.

ASSISTANT: Please help me with your travel dates.

USER: My scheduled dates to travel is from 04/01 to 04/03.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: Ok, no issues. Thank you for giving quick response.

ASSISTANT: Thank you for opting us.