You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you for today?

USER: I need to travel to some other location, so I need to change my locations in the previous ticket. Can you help me in altering my ticket?

ASSISTANT: Yes, I will help you about it. Can you please let me know your name for checking the existing reservation under your name?

USER: My name is Jennifer Harris.

ASSISTANT: I have found a reservation under your name. Please, provide your modified source and destination codes.

USER: Ok, my source and destination airport codes are IAH and PHX.

ASSISTANT: Please, provide your travelling dates.

USER: My trip dates should be same as in my previous ticket, those are 01/07 and 01/09.

ASSISTANT: There is a direct flight to PHX. Would you like to book this flight ticket?

USER: Can you please recheck the flight having a connection limit 1?

ASSISTANT: Sorry Harris, there is no flight with 1 connected flight to PHX.

USER: It's ok, I will choose some other source to travel. Anyway's thank you for searching.

ASSISTANT: Most welcome. Hope you have a great day.

USER: Thank you.