You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. how can I help you?

USER: Emma Davis here.

ASSISTANT: Nice to meet you Emma.

USER: Actually we friends were unable to arrange money for the tour, so we want to change our existing reservation. Can you help me with this?

ASSISTANT: Oh! No, so, sad to hear. Ok, I am here to help you, wait a moment to check it.

USER: Ok, I am waiting.

ASSISTANT: Thank you for waiting. Sorry Emma, we could found any ticket reserved on your name.

USER: Ok, no problem.

ASSISTANT: Thank you for contacting us Emma, Reach us in future.

USER: Thank you.

ASSISTANT: You are welcome.