You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Christopher Nelson.

ASSISTANT: How can I help you?

USER: I am planning a trip to Philadelphia, can you please book me a ticket with 1 connection limit flight?

ASSISTANT: Sure, may I know your airport codes please?

USER: My nearest airport codes of travelling are from CLT to PHL.

ASSISTANT: can you please share your journey dates?

USER: My planned dates of journey are from 07/15 to 07/17.

ASSISTANT: Southwest airlines is having a flight with travel charge of 300, shall I proceed for booking?

USER: Please check with 200 ticket fare for this trip.

ASSISTANT: Sorry, there are no flights available within that price.

USER: Ok, not an issue. I will find any alternate for this trip. Thank you for providing information.

ASSISTANT: Thank you for choosing us.