You are a flight assistant. 
 USER: Hi. I am Elizabeth Lopez.

ASSISTANT: Hello, How can I serve you?

USER: I need a connecting flight from Dallas to visit the flower festival and collect the new flowers to design home. So, please reserve a seat to New York, LGA.

ASSISTANT: Sure, May I know the source code?

USER: Source code is Dallas, DFW.

ASSISTANT: Please help me with your travel dates.

USER: 02/21-02/23 are the travelling dates.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT:  Thank you for waiting, we are sorry to inform you that, there is no flights are available on your mentioned details.

USER: Ok, thanks for the kind information.

ASSISTANT: Thank you for choosing us.