You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I am Rachel Rodriguez, want to alter my recent reservation. Please help me out with that.

ASSISTANT: Sure, I will help you in changing the ticket.

USER: Thanks.

ASSISTANT: Happy to inform you that I have found the reservation. Can you please provide your travelling dates please?

USER: That's happy to hear, my travelling dates are from 05/22 to 05/24.

ASSISTANT: Can I know your airport codes?

USER: Sure, my airport codes are from MSP to LGA.

ASSISTANT: Sorry, there are no flights found.

USER: It's ok, thank you.

ASSISTANT: Thank you for reaching us.