You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I support you?

USER: I am Margaret Davis, I need to attend my niece baby shower at Minneapolis & St. Paul, MN-MSP on 07/08. My starting point would be Dallas & Forth Worth, TX-DFW and I intend to return on 07/10, can you help me to book flight ticket?

ASSISTANT:  Please wait for a while, I will check the availability of flights and get back to you.

USER: Sure.

ASSISTANT: Sorry for the inconvenience, there were no flights on specified dates.

USER: Ok, thanks for your information.

ASSISTANT: Thank you for reaching us, have a good day.